How do I redirect to another forum?

[Kassandra]

I have searched with everything I can think of to see if I can find any info on this. If my search words were off and there is a thread out there to help I'm sorry in advance. But have to ask regardless.

Basically what I want to do, is have a redirect to a second forum when you enter a subsection on the first forum. I have tried a simple redirect on the sites admin and it won't allow the page to be displayed.

In example on http://firstforum.com you click on a sub forum for roleplay and as you enter it redirects to http://secondforum.com. It's an affiliate thing if that helps any.

So I am guessing it's harder than I think. Or maybe something I am missing.

Any help would be very much appreciated.